Trouble keeping bleeder hose connected

I've found that keeping the bleeding hose connected to the bleeder can be a pain in the butt. Not sure if it is on tight. Are those bubbles coming from the brake lines, or air is being sucked in at the bleeder. How about putting the wrench on or off and the hose falls off. I have found the perfect thing to use. Just about every car guy has 1 or 2 of these hanging around. The rubber is soft and makes a good seal around the bleeder. Check out picture #1 in this pic vacuum has been holding for 2 hrs. Your looking at a spark plug wire boot. Who would have thought. In pic#2 I cut the end of the tube, so no matter how the tube is pushed in it. It won't be plugged up.
Now I wish I could rotate the pic's 90* to the right. I don't know what happens or why it happens.